Astm E562-19e1 [EXCLUSIVE – RELEASE]

Measurements must be spread evenly across the sample rather than clustering in one ideal zone. Operators must choose a set number of fields of view (

The standard is widely applicable across industries utilizing advanced alloys, including aerospace, automotive, oil and gas, and nuclear engineering. Common use cases include:

Move the stage systematically using a micrometer scale without looking through the eyepiece. astm e562-19e1

Data is carefully recorded, often in a structured table or a pre-made Excel spreadsheet. The spreadsheet automatically calculates the volume fraction for each field, the mean, standard deviation, 95% confidence interval, and the final %RA achieved.

The operator evaluates each intersection point on the grid according to strict scoring parameters: Measurements must be spread evenly across the sample

The standard recommends that the relative accuracy (half-width of CI divided by ( \barV_V )) should be ≤ 10% for most applications. If your CI is too wide, increase the number of points.

The "e1" in ASTM E562-19e1 signifies an editorial revision to the 2019 standard, highlighting the rigorous statistical framework required to validate the data. Data is carefully recorded, often in a structured

Because it relies on manual evaluation, variations in operator judgment can lead to slight discrepancies, though this is mitigated by thorough training and following the standard's statistical checks.

ASTM E562-19e1 is a widely accepted, foundational manual test method for determining the volume fraction of microstructural phases by superimposing a grid over a micrograph. Considered an economical and relatively simple technique, it is ideal for smaller labs, though it is highly operator-dependent, slow, and can have errors exceeding 10%. For a detailed overview, visit Infinita Lab .

The ASTM E562 method relies on the mathematical principles of stereology. Stereology relates three-dimensional structural parameters to two-dimensional measurements made on a cutting plane. The Point Fraction to Volume Fraction Relationship